From: LJ

In an interview with Tom Tilley from Triple J Hack on 21 February 2017, Minister Alan Tudge said, "Now, if a person that we know is vulnerable and they've got a vulnerability indicator on their file, they will not be sent any sort of notice. They simply are not covered…"

ALAN TUDGE:
Well, as I said, if they've got any sort of vulnerability index written on his file, then they don't get sent these notices.

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Your requests seem like things that would be in a documents so prefacing each section with something like "any document that contains or describes XXX" should cover it. Most other agencies respond with a suggestion to do something similar to that when general questions are asked through FOI (or work on administrative access but that isn't the DHS way it seems).